我们正在尝试使用Proguard 5.2来混淆JavaFX中的应用程序，该应用程序具有Jackson Json作为Json序列化程序。应用程序在没有使用Proguard的情况下工作正常，但是当我们对代码进行模糊处理时，我们只是通过实例化一个新的ObjectMapper来获得异常，Java声称它找不到这个类。
ObjectMapper mapper = new ObjectMapper();
异常消息：
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/ObjectMapper
at br.ufmg.dcc.isajavafx.excelreader.ISAExcelTemplate.toJSON(ISAExcelTemplate.java:315)
at br.ufmg.dcc.isajavafx.controller.MainController.checkConfigurationFiles(MainController.java:607)
at br.ufmg.dcc.isajavafx.controller.MainController.initialize(MainController.java:632)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2425)
at br.ufmg.dcc.isajavafx.ISAJavaFX.start(ISAJavaFX.java:30)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
... 1 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.ObjectMapper
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 15 more
Exception running application mypackage.myclass
这是我们的proguard配置文件：
-libraryjars /usr/lib/jvm/java-8-oracle/jre/lib/rt.jar
-libraryjars /usr/lib/jvm/java-8-oracle/jre/lib/ext/jfxrt.jar
-libraryjars target/lib/jackson-annotations-2.7.0.jar
-libraryjars target/lib/jackson-core-2.7.0.jar
-libraryjars target/lib/jackson-databind-2.7.1-SNAPSHOT.jar
-libraryjars target/lib/commonj.sdo-2.1.1.jar
-libraryjars target/lib/commons-codec-1.9.jar
-libraryjars target/lib/controlsfx-8.40.11.jar
-libraryjars target/lib/javax.persistence-2.1.0.jar
-libraryjars target/lib/poi-3.13.jar
-libraryjars target/lib/poi-ooxml-3.13.jar
-libraryjars target/lib/poi-ooxml-schemas-3.13.jar
...
-keepnames class org.codehaus.jackson.** { *; }
-keepnames class com.fasterxml.jackson.databind.** { *; }
-dontwarn com.fasterxml.jackson.databind.**
-keep public class classes.to.be.serialized** {public private protected *;}
classes.to.be.serialized的所有成员都是公共的，有些是原始类型，其他的不是基元，也应该被忽略。
问题是我们收到的错误就像找不到杰克逊图书馆一样。在混淆之前和之后，罐子都在我们的类路径中。
答案 0 :(得分：0)